AD9772A
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AD9772A

14-Bit, 160 MSPS TxDAC+® with 2x Interpolation Filter

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Part Details
Part Models 2
1ku List Price Starting From $23.01
Features
  • Single 3.1 V to 3.5 V Supply
  • 14-Bit DAC Resolution and Input Data Width
  • 160 MSPS Input Data Rate
  • 67.5 MHz Reconstruction Pass Band @ 160 MSPS
  • 74 dBc SFDR @ 25 MHz
  • 250 mW Power Dissipation; 13 mW with Power-Down Mode
  • 48-Lead LQFP Package
  • See Data Sheet for Additional Information
Additional Details
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The AD9772A is a single-supply, oversampling, 14-bit digital-to-analog converter (DAC) optimized for baseband or IF waveform reconstruction applications requiring exceptional dynamic range. Manufactured on an advanced CMOS process, it integrates a complete, low distortion 14-bit DAC with a 2× digital interpolation filter and clock multiplier. The on-chip PLL clock multiplier provides all the necessary clocks for the digital filter and the 14-bit DAC. A flexible differential clock input allows for a single-ended or differential clock driver for optimum jitter performance.

For baseband applications, the 2× digital interpolation filter provides a low-pass response, thus providing as much as a threefold reduction in the complexity of the analog reconstruction filter. It does so by multiplying the input data rate by a factor of 2 while suppressing the original upper in-band image by more than 73 dB. For direct IF applications, the 2× digital interpolation filter response can be reconfigured to select the upper in-band image (that is, the high-pass response) while suppressing the original baseband image. To increase the signal level of the higher IF images and their pass-band flatness in direct IF applications, the AD9772A also features a zero-stuffing option in which the data following the 2× interpolation filter is upsampled by a factor of 2 by inserting midscale data samples.

The AD9772A can reconstruct full-scale waveforms with band-widths of up to 67.5 MHz while operating at an input data rate of 160 MSPS. The 14-bit DAC provides differential current outputs to support differential or single-ended applications.

A segmented current source architecture is combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance. Matching between the two current outputs ensures enhanced dynamic performance in a differential output configuration. The differential current outputs can be fed into a transformer or a differential op amp topology to obtain a single-ended output voltage using an appropriate resistive load.

The on-chip band gap reference and control amplifier are con-figured for maximum accuracy and flexibility. The AD9772A can be driven by the on-chip reference or by a variety of external reference voltages. The full-scale current of the AD9772A can be adjusted over a 2 mA to 20 mA range, thus providing additional gain-ranging capabilities.

The AD9772A is available in a 48-lead LQFP package and is specified for operation over the industrial temperature range of –40°C to +85°C.

APPLICATIONS

  • Communication transmit channel
    W-CDMA base stations, multicarrier base stations,
    direct IF synthesis, wideband cable systems
  • Instrumentation
Part Models 2
1ku List Price Starting From $23.01

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Dec 7, 2016

- 16_0033

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select QFP Products

Jan 5, 2009

- 07_0077

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Dec 7, 2016

- 16_0033

arrow down

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select QFP Products

Jan 5, 2009

- 07_0077

arrow down

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

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